International Standard Identifier for Libraries and Related Organizations

The purpose of ISIL is to define and promote the use of a set of standard identifiers for the unique identification of libraries and related organizations with a minimum impact on already existing systems.

A national or institutional allocation agency assigns the specific identifier for a library or an organization. Libraries and organizations have to contact their national agency to get an ISIL standard identifier.  

Contact ISIL/RA

Ole Olsen-Bagneux

AR Argentine Republic Argentine Standardization and Certification Institute (IRAM) n/a
AT Austria Die Österreichische Bibliothekenverbund und Service GmbH Search
AU Australia National Library of Australia Search
BE Belgium Royal Library of Belgium Search
BY Belarus National Library of Belarus n/a
BG Bulgaria National Library of Bulgaria Search
CA Canada Library and Archives Canada Search
CH Switzerland Swiss National Library Search
CY Cyprus Cyprus University of Technology – Library List
DE Germany Staatsbibliothek zu Berlin Search
DK Denmark Danish Agency for Culture and Palaces List
EG Egypt Egyptian National Scientific and Technical Information Network (ENSTINET) Search
FI Finland The National Library of Finland Search
FR France Agence Bibliographique de l'Enseignement Superieur Search
GB United Kingdom British Library List
GL Greenland Central and Public Library of Greenland List
IL Israel National Library of Israel List
IR Islamic Republic of Iran National Library and Archives of Islamic Republic of Iran of Iran Search List
IT Italy Istituto Centrale per il Catalogo Unico delle biblioteche italiane e per le informazioni bibliografiche Search
JP Japan National Diet Library List
KR Republic of Korea The National Library of Korea Search
LU Luxembourg Archives nationales de Luxembourg List
NL The Netherlands Koninklijke Bibliotheek, National Library of the Netherlands n/a
NO Norway National Library of Norway Search
NZ New Zealand National Library of New Zealand Te Puna Matauranga o Aotearoa Search
QA Qatar Qatar National Library (QNL) Search
RU Russian Federation Russian National Public Library for Science and Technology n/a
SI The Republic of Slovenia National and University Library List
SK Slovak Republic Slovak National Library List
US United States of America Library of Congress Search Search

Non-national ISIL Allocation Agencies and code prefix for the identifiers

EUR Code for common European organizations. HAEU List
O Code O (letter) for OCLC for technical encoding in e.g. RFID tags. See OCLC -
OCLC WorldCat Symbol OCLC Search
ZDB Staatsbibliothek zu Berlin - Zeitschriftendatenbank Staatsbibliothek zu Berlin Search


An ISIL country code is the equivalent of the codes specified in ISO 3166-1.

See ISO 3166-1 decoding table:

ISIL is developed within the framework of Technical Committee 46/Subcommittee 4 (TC46/SC4)

TC 46 - Information and Documentation - SC 4 - Technical Interoperability
SC4 at ISO homepage

International Organization for Standardization

If you want to buy the standard, please contact national member body of ISO: or go to ISO 15511 in ISO Catalogue 

Last updated: 20.10.2017
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